Family name Zdrnja (Zdrnja 
) , across the world, is a rare last name. The surname Zdrnja is habitual in Serbia, where it is quite a rare surname, Croatia, where it is a very rare surname, and Australia. In absolute terms, it is commonest in Serbia, the United States, and Australia.
| VARIANT | COUNTRY |
|---|---|
| Zdrnja | Australia, Germany, United States, Serbia, Croatia |